OBJECTIVE Variability in the breathing pattern of patients with cancer during radiotherapy requires mitigation, including enlargement of the planned treatment field, treatment gating and breathing guidance interventions. Here, we provide the first demonstration of how easy it is to mechanically ventilate patients with breast cancer while fully conscious and without sedation, and we quantify the...

There is evidence to suggest that airborne droplets play an important role in the transmission of respiratory diseases. The highest risk exposure these pathogens indoor environments, where airflow control has been recognized as one most effective engineering means combat its spread. However, this can contribute a significant increase energy costs, conventional ventilation often not designed rem...

Mine ventilation provides fresh air to underground workers. The dampers can provide a qualified each demand workplace by adjusting the volume, which ensure workers’ health. However, powerful impact damage caused gas explosions in roadway lead deformation and even cause breakdown of system. At same time, effects may worker fatalities. For this reason, dynamic response their need be studied. Base...

Current guidelines for green buildings are cursory and inadequate for specifying materials and designing ventilation systems to ensure a healthful indoor environment, i.e. a “healthy building,” by design. Public perception, cultural preferences, litigation trends, current codes and regulations, rapid introduction of new building materials and commercial products, as well as the prevailing desig...

BACKGROUND Intraoperative bacterial contamination is a major risk factor for postoperative wound infections. This study investigated the influence of type of ventilation system on intraoperative airborne bacterial burden before and after installation of unidirectional displacement air flow systems. MATERIAL AND METHODS We microbiologically monitored 1286 surgeries performed by a single surgic...

Abstract Ventilation might play an important role in airborne transmission. By using the computational fluid dynamics (CFD) method, ventilation modes, rates, and infection source’s face direction were considered a multi-person indoor environment (10 m*10 m*3 m). The airflow patterns, virus concentration distribution, probability studied. results showed that was lower with displacement (DV, in, ...